Desempenho e respostas termorregulat?rias de su?nos da ra?a Piau submetidos ?s condi??es de termoneutralidade e de alta temperatura ambiente

Autor: Teixeira, Al?pio dos Reis
Přispěvatelé: Campos, Paulo Henrique Reis Furtado, Fonseca, Leonardo da Silva, Teixeira, Alexandre de Oliveira, Veroneze, Renata, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
Jazyk: portugalština
Rok vydání: 2019
Předmět:
Zdroj: Repositório Institucional da UFVJM
Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
instacron:UFVJM
Popis: O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - C?digo de Financiamento 001. Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2021-05-12T13:33:10Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) alipio_reis_teixeira.pdf: 1007193 bytes, checksum: a3adcdb9a8b48038674531ca14b2059a (MD5) Approved for entry into archive by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2021-05-12T14:00:04Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) alipio_reis_teixeira.pdf: 1007193 bytes, checksum: a3adcdb9a8b48038674531ca14b2059a (MD5) Made available in DSpace on 2021-05-12T14:00:04Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) alipio_reis_teixeira.pdf: 1007193 bytes, checksum: a3adcdb9a8b48038674531ca14b2059a (MD5) Previous issue date: 2019 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) Objetivou-se com o presente estudo avaliar o desempenho e as respostas fisiol?gicas de su?nos da ra?a naturalizada Piau submetidos ?s condi??es de termoneutralidade (22?C) e alta temperatura ambiente (30?C). O experimento foi conduzido na Unidade de Ensino, Pesquisa e Extens?o em Melhoramento de Su?nos da Universidade Federal de Vi?osa (UFV). Foram utilizados 28 su?nos (21 machos castrados e 7 f?meas) com idade m?dia de 162 dias e peso vivo inicial de 64,4 ? 1,9 kg. O experimento foi conduzido em delineamento inteiramente casualizado e o animal foi considerado a unidade experimental. Os tratamentos consistiram em duas temperaturas ambiente: 22?C e 30?C. Foram utilizados 10 machos e 4 f?meas para a condi??o de 30?C, e 11 machos e 3 f?meas para a condi??o de 22?C. Os animais foram alojados em baias individuais suspensas. O experimento teve dura??o de 21 dias, composto por uma etapa de adapta??o de sete dias a 24?C (dia -7 a -1); e etapa experimental de 14 dias subdivididos em dois subper?odos 1 a 7 dias e 8 a 14 dias. O consumo de ra??o e ganho de peso foram avaliados semanalmente. A frequ?ncia respirat?ria, temperaturas cut?neas (nuca, dorso e flanco) e temperatura retal de cada animal foram avaliados nos dias -4, -2, 1, 2, 3, 5, 7, 9, 11 e 13 ?s 15:00 horas. Ao final do per?odo experimental, a espessura de toucinho e ?rea de olho de lombo dos animais foram avaliadas. As vari?veis estudadas foram analisadas por meio dos modelos linear geral e misto do software SAS. Os animais submetidos a condi??o de alta temperatura ambiente tiveram menor consumo de ra??o (2043 vs. 2399 g/d, P0.05). Independentemente do dia experimental, a alta temperatura ambiente resultou em aumento (P0.05). De acordo com os resultados, apesar dos efeitos negativos no desempenho produtivo, su?nos da ra?a Piau s?o eficientes em manter a homeotermia em condi??es de alta temperatura ambiente. Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2019. The aim of this study was to evaluate the performance and physiological responses of Piau naturalized pigs submitted to thermoneutrality (22?C) and high ambient temperature (30?C) conditions..The experiment was conducted at the Pig Breeding Teaching, Research and Extension Unit of the Federal University of Vi?osa (UFV). Twenty eight pigs (21 castrated males and 7 females) with an average age of 162 days and initial live weight of 64.4 ? 1.9 kg were used. The experiment was conducted in a completely randomized design and the animal was considered the experimental unit. The treatments consisted of two ambient temperatures: 22?C and 30?C. We used 10 males and 4 females for the 30?C condition, and 11 males and 3 females for the 22?C condition. The animals were housed in individual suspended pens. The experiment lasted 21 days, consisting of an adaptation step of seven days at 24?C (day -7 to -1); and 14-day experimental stage subdivided into, (1 to 7 days) and (8 to 14 days). Feed intake and weight gain were evaluated weekly. The respiratory rate, skin temperatures (neck, back and flank) and rectal temperature of each animal were measured on days -4, -2, 1, 2, 3, 5, 7, 9, 11 and 13 at 15:00 hours. At the end of the experimental stage, the fat thickness and the loin eye area of the animals were evaluated. The variables studied were analyzed using the general linear and mixed SAS software models. The animals submitted to the high ambient temperature condition had lower feed intake (2043 vs. 2399 g / d) and daily weight gain (443 vs. 565 g / d) when compared to the animals kept in thermoneutrality. Room temperature did not affect feed conversion (4.7 g / g). Regardless of the experimental day, the high ambient temperature resulted in increased neck temperature (+ 2.3oC), back (+ 2.3oC) flank (+2.2oC) and increased respiratory rate (+27 mov / min.). Rectal temperature was not affected by ambient temperature (P>0.05). According to the results, despite the negative effects on productive performance, Piau pigs are efficient in maintaining homeothermia in high ambient temperature conditions.
Databáze: OpenAIRE
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